All categories

3 years ago

Are rational numbers closed under squaring?

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

5 0

Answer:

The integers are "closed" under addition, multiplication and subtraction, ... The rational numbers are "closed" under addition, subtraction, and multiplication

Step-by-step explanation:

You might be interested in

The speed limit on a highway is 60 miles per hour. A vehicle travels for 2.2 hours on the highway and covers 165 miles. By how m

elena-s [515]

Answer:

15 miles over

Step-by-step explanation:

r=d/t

r= 165/2.2

rate=75

75 miles - 60 miles=

15 miles

5 0

3 years ago

A 5 pound Cartoon Clementine oranges is priced at $4.30 what is the price per pound of Clementine oranges

Y_Kistochka [10]

Answer:

The answer to your question is 0.86.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A padlock has a 4 digit key code

german

Where is the rest of the question?

6 0

3 years ago

What are the roots of x in -10x2 + 12x − 9 = 0?

hoa [83]

Answer:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

Step-by-step explanation:

Use the Quadratic formula:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

You can identify that, in this case:

$a=-10\\b=12\\c=-9$

Now you need to substitute these values into the formula:

$x=\frac{-12\±\sqrt{12^2-4(-10)(-9)}}{2(-10)}$

$x=\frac{-12\±\sqrt{-216}}{-20}$

Remember that:

$i=\sqrt{-1}$

Therefore,rewriting and simplifying, you get:

$x=\frac{-12\±6i\sqrt{6}}{-20}$

$x=\frac{-6(2\±i\sqrt{6})}{-2(10)}$

$x=\frac{3(2\±i\sqrt{6})}{10}$

Then, you get the following roots:

$x_1=\frac{3(2+i\sqrt{6})}{10}$

$x_2=\frac{3(2-i\sqrt{6})}{10}$

6 0

3 years ago

Read 2 more answers

Michael has to pay $300 rent. He gets paid $18 per hour. Write an equation that represents his profit, y, after working x hours.

mixer [17]

Answer:

A.) 300 = $18x

B.) 277.50 = $9.25x

C.) 360 years

Step-by-step explanation:

5 0

3 years ago